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Poly Aluminium Chloride
Poly Aluminium Chloride (PAC) is an advanced, high-performance inorganic coagulant used in various water treatment applications. It is widely employed in municipal and industrial water treatment processes due to its superior coagulation, flocculation, and purification properties. PAC is available in both liquid and powder forms, offering flexibility in usage across different industries. Compared to traditional coagulants such as aluminum sulfate (alum) and ferric chloride, PAC demonstrates higher efficiency, reduced sludge production, and better adaptability to a wide range of water conditions.
Composition and Chemical Properties
Poly Aluminium Chloride is a polymeric compound composed of aluminum, chlorine, and hydroxyl groups. The chemical formula varies depending on the production process and intended application, but it generally falls within the range of [Al2(OH)nCl6-n]m, where "n" and "m" indicate the degree of polymerization. This polymeric structure enhances its coagulation efficiency by forming larger and denser flocs, leading to faster settling times and improved water clarity. PAC is produced through the controlled reaction of aluminum hydroxide or bauxite with hydrochloric acid, resulting in a highly stable and soluble coagulant. Its concentration is typically measured in terms of basicity, which represents the percentage of hydroxyl groups in the molecule. High-basicity PAC is preferred for water treatment as it requires lower dosages, reduces sludge generation, and minimizes residual aluminum in treated water.
Storage and Handling
Poly Aluminium Chloride should be stored in a cool, dry place away from direct sunlight and moisture. It is recommended to use corrosion-resistant containers for storage, as PAC can be reactive with certain metals. When handling PAC, protective gear such as gloves and safety goggles should be worn to prevent skin and eye irritation. Proper ventilation should also be ensured in areas where PAC is used to avoid inhalation of dust or fumes.
Conclusion
Poly Aluminium Chloride (PAC) is a highly effective and versatile coagulant that plays a vital role in water purification and wastewater treatment across multiple industries. Its superior performance, lower chemical consumption, and environmental benefits make it a preferred choice over traditional coagulants. With its ability to enhance water clarity, remove impurities, and reduce sludge generation, PAC continues to be an essential component in modern water treatment solutions.